ospf6d/ospf6_main.c

   1 /*
   2  * Copyright (C) 1999 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23 #include <lib/version.h>
  24 #include <stdlib.h>
  25
  26 #include "getopt.h"
  27 #include "thread.h"
  28 #include "log.h"
  29 #include "command.h"
  30 #include "vty.h"
  31 #include "memory.h"
  32 #include "memory_vty.h"
  33 #include "if.h"
  34 #include "filter.h"
  35 #include "prefix.h"
  36 #include "plist.h"
  37 #include "privs.h"
  38 #include "sigevent.h"
  39 #include "zclient.h"
  40 #include "vrf.h"
  41 #include "bfd.h"
  42 #include "libfrr.h"
  43
  44 #include "ospf6d.h"
  45 #include "ospf6_top.h"
  46 #include "ospf6_message.h"
  47 #include "ospf6_asbr.h"
  48 #include "ospf6_lsa.h"
  49 #include "ospf6_interface.h"
  50 #include "ospf6_zebra.h"
  51
  52 /* Default configuration file name for ospf6d. */
  53 #define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
  54
  55 /* Default port values. */
  56 #define OSPF6_VTY_PORT             2606
  57
  58 /* ospf6d privileges */
  59 zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND};
  60
  61 struct zebra_privs_t ospf6d_privs = {
  62 #if defined(FRR_USER)
  63         .user = FRR_USER,
  64 #endif
  65 #if defined FRR_GROUP
  66         .group = FRR_GROUP,
  67 #endif
  68 #ifdef VTY_GROUP
  69         .vty_group = VTY_GROUP,
  70 #endif
  71         .caps_p = _caps_p,
  72         .cap_num_p = 2,
  73         .cap_num_i = 0};
  74
  75 /* ospf6d options, we use GNU getopt library. */
  76 struct option longopts[] = {{0}};
  77
  78 /* Master of threads. */
  79 struct thread_master *master;
  80
  81 static void __attribute__((noreturn)) ospf6_exit(int status)
  82 {
  83         struct listnode *node;
  84         struct interface *ifp;
  85
  86         if (ospf6)
  87                 ospf6_delete(ospf6);
  88
  89         bfd_gbl_exit();
  90
  91         for (ALL_LIST_ELEMENTS_RO(vrf_iflist(VRF_DEFAULT), node, ifp))
  92                 if (ifp->info != NULL)
  93                         ospf6_interface_delete(ifp->info);
  94
  95         ospf6_message_terminate();
  96         ospf6_asbr_terminate();
  97         ospf6_lsa_terminate();
  98
  99         vrf_terminate();
 100         vty_terminate();
 101         cmd_terminate();
 102
 103         if (zclient)
 104                 zclient_free(zclient);
 105
 106         if (master)
 107                 thread_master_free(master);
 108
 109         closezlog();
 110
 111         exit(status);
 112 }
 113
 114 /* SIGHUP handler. */
 115 static void sighup(void)
 116 {
 117         zlog_info("SIGHUP received");
 118 }
 119
 120 /* SIGINT handler. */
 121 static void sigint(void)
 122 {
 123         zlog_notice("Terminating on signal SIGINT");
 124         ospf6_exit(0);
 125 }
 126
 127 /* SIGTERM handler. */
 128 static void sigterm(void)
 129 {
 130         zlog_notice("Terminating on signal SIGTERM");
 131         ospf6_clean();
 132         ospf6_exit(0);
 133 }
 134
 135 /* SIGUSR1 handler. */
 136 static void sigusr1(void)
 137 {
 138         zlog_info("SIGUSR1 received");
 139         zlog_rotate();
 140 }
 141
 142 struct quagga_signal_t ospf6_signals[] = {
 143         {
 144                 .signal = SIGHUP,
 145                 .handler = &sighup,
 146         },
 147         {
 148                 .signal = SIGINT,
 149                 .handler = &sigint,
 150         },
 151         {
 152                 .signal = SIGTERM,
 153                 .handler = &sigterm,
 154         },
 155         {
 156                 .signal = SIGUSR1,
 157                 .handler = &sigusr1,
 158         },
 159 };
 160
 161 FRR_DAEMON_INFO(ospf6d, OSPF6, .vty_port = OSPF6_VTY_PORT,
 162
 163                 .proghelp = "Implementation of the OSPFv3 routing protocol.",
 164
 165                 .signals = ospf6_signals,
 166                 .n_signals = array_size(ospf6_signals),
 167
 168                 .privs = &ospf6d_privs, )
 169
 170 /* Main routine of ospf6d. Treatment of argument and starting ospf finite
 171    state machine is handled here. */
 172 int main(int argc, char *argv[], char *envp[])
 173 {
 174         int opt;
 175
 176         frr_preinit(&ospf6d_di, argc, argv);
 177         frr_opt_add("", longopts, "");
 178
 179         /* Command line argument treatment. */
 180         while (1) {
 181                 opt = frr_getopt(argc, argv, NULL);
 182
 183                 if (opt == EOF)
 184                         break;
 185
 186                 switch (opt) {
 187                 case 0:
 188                         break;
 189                 default:
 190                         frr_help_exit(1);
 191                         break;
 192                 }
 193         }
 194
 195         if (geteuid() != 0) {
 196                 errno = EPERM;
 197                 perror(ospf6d_di.progname);
 198                 exit(1);
 199         }
 200
 201         /* thread master */
 202         master = frr_init();
 203
 204         vrf_init();
 205         access_list_init();
 206         prefix_list_init();
 207
 208         /* initialize ospf6 */
 209         ospf6_init();
 210
 211         frr_config_fork();
 212         frr_run(master);
 213
 214         /* Not reached. */
 215         ospf6_exit(0);
 216 }